CVE-2026-64584— Linux kernel 安全漏洞
一分钟漏洞结论
影响对象
Linux Linux
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于f_midi驱动在释放midi对象前未取消待处理的IN工作项，可能导致释放后重用。
可能的 ATT&CK 技术 1 AI
T1203 · Exploitation for Client Execution影响版本矩阵 21
| 厂商 | 产品 | 版本范围 | 状态 |
|---|---|---|---|
| Linux | Linux | 3635523e9b96213969693c320302d536774d8e9b< f3c6f2c38062703d3dc7f86958bb0790c6959add |
affected |
8653d71ce3763aedcf3d2331f59beda3fecd79e4< df18150126f66817e4d3f79f309e9c92d6ff384e |
affected | ||
8653d71ce3763aedcf3d2331f59beda3fecd79e4< 620955b222c47332297d6bf38f78541aa699238a |
affected | ||
8653d71ce3763aedcf3d2331f59beda3fecd79e4< 380b4bef46c2eb260c7a9c6bb2c5be33ce5a38f9 |
affected | ||
8653d71ce3763aedcf3d2331f59beda3fecd79e4< 87bc316dd6fc90072297c635e10b9aa6075ecda1 |
affected | ||
8653d71ce3763aedcf3d2331f59beda3fecd79e4< f45089eaad0a083d71d84ff175741d7e157d9b69 |
affected | ||
8653d71ce3763aedcf3d2331f59beda3fecd79e4< ac9a51d910bb7465c554c45320cb6c09f3d0b49d |
affected | ||
8653d71ce3763aedcf3d2331f59beda3fecd79e4< 5650c18d93a1db7e27cb5a40b394747eb4686d5b |
affected | ||
| … +13 条更多 | |||
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一、 漏洞 CVE-2026-64584 基础信息
漏洞信息
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Vulnerability Title
usb: gadget: f_midi: cancel pending IN work before freeing the midi object
来源: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: f_midi: cancel pending IN work before freeing the midi object
The f_midi driver embeds a work item (midi->work) whose handler,
f_midi_in_work(), dereferences the enclosing struct f_midi through
container_of(). This work is armed from two sites: f_midi_complete(),
on a normal IN-endpoint completion, and f_midi_in_trigger(), on an ALSA
rawmidi output-stream start.
Neither f_midi_disable() nor f_midi_unbind() cancels midi->work.
f_midi_disable() only disables the endpoints and drains the in_req_fifo;
it does not synchronize the work item, and the sound card is released
asynchronously to the final free of the midi object.
The midi object is reference-counted (midi->free_ref) and is freed in
f_midi_free() only once both the usb_function reference and the rawmidi
private_data reference have been dropped. In f_midi_unbind(),
f_midi_disable() runs before the sound card is released, so while the
USB endpoints are already disabled the rawmidi device is still usable by
an open substream. A concurrent userspace write on such a substream can
reach f_midi_in_trigger() and queue midi->work again after
f_midi_disable() has returned. A work item armed this way may still be
pending when the last reference drops and f_midi_free() proceeds to
kfree(midi), letting f_midi_in_work() dereference the struct after it
has been freed, a use-after-free.
For this reason cancelling midi->work in f_midi_disable() would not be
sufficient: the ALSA trigger path can rearm the work after disable()
returns. Cancelling at the refcount-zero free site is the boundary
after which neither arming source can survive, because by then both
references that keep the midi object alive have been dropped: the USB
endpoints are already disabled and the rawmidi device has been released.
Fix this by calling cancel_work_sync(&midi->work) in the refcount-zero
block of f_midi_free(), before the embedded work_struct is freed along
with the rest of the structure. opts->lock is a sleeping mutex, so
calling cancel_work_sync() under it is permitted, and the handler takes
midi->transmit_lock rather than opts->lock, so no self-deadlock can
occur while it waits for a running instance of the work to finish.
This issue was found by an in-house static analysis tool.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
N/A
来源: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于f_midi驱动在释放midi对象前未取消待处理的IN工作项，可能导致释放后重用。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2026-64584 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-64584 补丁与修复 (8)
同批安全公告 · Linux · 2026-08-06 · 共 22 条
| CVE-2026-64597 | 9.8 CRITICAL | Linux kernel 安全漏洞 |
| CVE-2026-64586 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64598 | 8.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64585 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64588 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64583 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64601 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64599 | 7.8 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-64587 | 7.0 HIGH | Linux kernel 安全漏洞 |
| CVE-2026-68480 | Linux kernel 安全漏洞 | |
| CVE-2026-64604 | Linux kernel 安全漏洞 | |
| CVE-2026-64603 | Linux kernel 安全漏洞 | |
| CVE-2026-64602 | Linux kernel 安全漏洞 | |
| CVE-2026-64596 | Linux kernel 安全漏洞 | |
| CVE-2026-64595 | Linux kernel 安全漏洞 | |
| CVE-2026-64593 | Linux kernel 安全漏洞 | |
| CVE-2026-64594 | Linux kernel 安全漏洞 | |
| CVE-2026-64592 | Linux kernel 安全漏洞 | |
| CVE-2026-64591 | Linux kernel 安全漏洞 | |
| CVE-2026-64590 | Linux kernel 安全漏洞 |
显示前 20 条，共 22 条。 查看全部 → →
IV. Related Vulnerabilities
V. Comments for CVE-2026-64584
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